def is_leap(year):
    if year % 4 == 0 and year % 100 != 0:
        print(year, "是闰年")
    elif year % 400 == 0:
        print(year, "是闰年")
    else:
        print(year, "不是闰年")


is_leap(2000)
is_leap(2001)
is_leap(2002)
is_leap(2003)
is_leap(2004)
